Adjustment Of Injection Timing; Method Of Adjusting Injection Timing; Tightening The Cylinder Head Bolts; Tightening Toruqes - KIRLOSKAR DV Series O & M Manual

7.2

Adjustment of Injection Timing

Injection timing is required to be adjusted when fuel pump has been removed from the engine during major
overhaul or fuel pump calibration.
7.2.1

Method of Adjusting Injection Timing

• Turn the flywheel until TDC mark on flywheel (Cylinder No.1) matches with the mark on flywheel
housing (Ensure that it is compression TDC). Then rotate the engine anti-clockwise so as to match
fuel timing mark on flywheel with mark on flywheel housing.
• Connect external diesel pump trolley to fuel pump.
• Start the pump and adjust delivery pressure to 15 bar.
• Rotate fuel pump shaft until fuel spill is cut-off for Cyl.No.1.
• Assemble fuel pump gear & tighten the bolts.
• Disconnect external diesel pump trolley.
• Assemble H.P. Pipes & Overflow Pipe.
Fuel injection timing (B.T.D.C static)
7.3

Tightening the cylinder head bolts

• The cylinder head bolts are to be tightened in steps as mentioned in table. Bolts are to be tightened
in diagonally opposite sequence.
The tightening by excessive torque may cause the damages of the cylinder head gaskets, the
flanges of cylinder liners and the cylinder head bolts, therefore obey the regular torque.

Tightening Toruqes

Sr. No. Parameter
1.1 Bolt for balance weight
1.2 Bolt for main bearing cap
1.3 Bolt for connecting rod (Ml 2 X 1.5)
1.4 Bolt for crank pulley
1.5 Bolt for flywheel
1.6 Bolt for bell housing
1.7 Nut for injector stud
1.8 Nut for fuel pump hub
1.9 Bolt for cylinder head
1.10 All M8x 1.25 screws/ bolts
1.11 All Ml Ox 1.5 screws/bolts
Note: Threads and seating faces of fasteners to be cleaned and wetted with engine oil, before assembly.
DV8 DV10
16° 16°
Tightening Method
Initial
torque
Kgm
Stage 1
5 15
5 15
5 15
5 10
10 25
– –
– –
5 15
– –
– –
DV12
16°
Total torque
Kgm
Stage 2 Stage3
30 35
26 –
26 –
20 –
49 –
– –
– –
26 –
– –
– –
torque
(Kgm)
35
26
26
20
49
3.5
20
26
2.5
3.5
83